Class: EllipticCurve::Signature

Inherits:
Object
  • Object
show all
Defined in:
lib/signature.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(r, s, recoveryId = nil) ⇒ Signature

Returns a new instance of Signature.



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# File 'lib/signature.rb', line 5

def initialize(r, s, recoveryId=nil)
    @r = r
    @s = s
    @recoveryId = recoveryId
end

Instance Attribute Details

#r ⇒ Object (readonly)

Returns the value of attribute r.



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# File 'lib/signature.rb', line 3

def r
  @r
end

#recoveryId ⇒ Object (readonly)

Returns the value of attribute recoveryId.



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# File 'lib/signature.rb', line 3

def recoveryId
  @recoveryId
end

#s ⇒ Object (readonly)

Returns the value of attribute s.



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# File 'lib/signature.rb', line 3

def s
  @s
end

Class Method Details

._fromString(string, recoveryId = nil) ⇒ Object 



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# File 'lib/signature.rb', line 46

def self._fromString(string, recoveryId=nil)
    @r, @s = Utils::Der.parse(string)[0]
    return Signature.new(@r, @s, recoveryId)
end

.fromBase64(string, recoveryByte = false) ⇒ Object 



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# File 'lib/signature.rb', line 34

def self.fromBase64(string, recoveryByte=false)
    der = Utils::Binary.byteStringFromBase64(string)
    return self.fromDer(der, recoveryByte)
end

.fromDer(string, recoveryByte = false) ⇒ Object 



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# File 'lib/signature.rb', line 24

def self.fromDer(string, recoveryByte=false)
    @recoveryId = nil
    if recoveryByte
        @recoveryId = string[0].ord - 27
        string = string[1..-1]
    end
    hexadecimal = Utils::Binary.hexFromByteString(string)
    return self._fromString(hexadecimal, @recoveryId)
end

Instance Method Details

#_toString ⇒ Object 



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# File 'lib/signature.rb', line 39

def _toString
    return Utils::Der.encodeConstructed(
        Utils::Der.encodePrimitive(Utils::Der::DerFieldType.integer, @r),
        Utils::Der.encodePrimitive(Utils::Der::DerFieldType.integer, @s)
    )
end

#toBase64(withRecoveryId = false) ⇒ Object 



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# File 'lib/signature.rb', line 20

def toBase64(withRecoveryId=false)
    return Utils::Binary.base64FromByteString(self.toDer(withRecoveryId))
end

#toDer(withRecoveryId = false) ⇒ Object 



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# File 'lib/signature.rb', line 11

def toDer(withRecoveryId=false)
    hexadecimal = self._toString
    encodedSequence = Utils::Binary.byteStringFromHex(hexadecimal)
    if not withRecoveryId
        return encodedSequence
    end
    return (27 + @recoveryId).chr + encodedSequence
end